Unit Conversion

Weight Converter

Convert metric and imperial weight units for cooking, fitness tracking, shipping, and everyday measurements.

Convert a weight value

Enter the weight, select the current unit, and choose the unit you need.

Clear

About this converter

How to use Weight Converter, plus the formulas and logic behind the results.

Tool description

The Weight Converter converts mass units such as milligrams, grams, kilograms, ounces, pounds, stones, and tons. It is intended for cooking, fitness, shipping, and general measurement—not for legal-for-trade weighing.

How to use

  1. Enter the mass or weight value.
  2. Choose the unit of the value you entered.
  3. Choose the unit you want to convert into.
  4. Select Convert to view the converted value and a full unit table.

Formulas

  • base kilograms = input × factor of the source unit
  • output = base kilograms ÷ factor of the target unit
  • 1 lb = 0.45359237 kg, 1 oz = 1/16 lb, 1 st = 14 lb

Quick reference

  • 1 kilogram ≈ 2.20462 pounds
  • 1 pound = 16 ounces
  • 1 stone = 14 pounds
  • 1 metric ton = 1,000 kilograms

Calculation logic

Each input is converted to kilograms, then scaled to the target unit. Using kilogram as the common base matches the SI definition of mass and keeps imperial conversions exact to their defined kilogram factors.

This tool converts mass units using standard definitions. Local commercial ton definitions may vary.

Weight Converter FAQ

Common questions about this converter and how to use the results.

How do I convert kilograms to pounds?

Multiply kilograms by 2.20462. For example, 1 kg ≈ 2.20462 lb.

How do I convert pounds to kilograms?

Multiply pounds by 0.45359237. For example, 10 lb ≈ 4.5359 kg.

How many ounces are in a pound?

There are 16 ounces in one pound.

What is a stone?

A stone is a British weight unit equal to 14 pounds (about 6.35 kg).

What is the difference between a metric ton and a US ton?

A metric ton is 1,000 kg. A US short ton is about 907.185 kg.

Can I convert milligrams and grams?

Yes. The converter supports milligrams, grams, kilograms, and larger mass units.